package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.javassist.tools.rmi.ObjectNotFoundException;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import static com.sky.entity.Orders.*;


@Slf4j
@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //1.处理各种异常，判断地址簿和购物车是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook==null ){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //查询购物车
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList==null || shoppingCartList.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //2.向订单表插入一条数据
        //构造订单表
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        //插入订单表
        orderMapper.insert(order);
        //3.向订单明细表插入多条数据
        //订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail =new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //插入多条订单明细
        orderDetailMapper.insertBatch(orderDetailList);
        //4.如果下单成功，清空用户购物车
        shoppingCartMapper.deleteByUserId(userId);
        //5.封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime()).build();

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);
//
//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }



        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code","ORDERPAID");

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        Map map=new HashMap<>();
        map.put("type",1);
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号："+ordersDB.getNumber());
        String Json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(Json);

    }

    /**
     * 订单探索
     * @param ordersPageQueryDTO
     * @return
     */
    public PageResult search(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    public OrderStatisticsVO statistics() {
        //查询对应状态的数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        //创造对象
        OrderStatisticsVO orderStatisticsVO =new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 查询订单详情根据订单id
     * @param id
     * @return
     */
    public OrderVO showOrderDetail(Long id) {
        //根据订单id查询订单
        Orders orders =orderMapper.getById(id);
        //根据订单id查询订单详情
        List<OrderDetail> orderDetailList =orderDetailMapper.getByOrderId(id);
        //赋值orderDishes
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        String orderDishes = String.join("", orderDishList);
        //将共同值赋值给OrderVO
        OrderVO orderVO =new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        orderVO.setOrderDishes(orderDishes);
        return orderVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    public void reject(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        if (orders == null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal("0.01"),
//                    new BigDecimal("0.01"));
            log.info("申请退款：{}", orders.getNumber());

        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        orders.setPayStatus(Orders.REFUND);
        orders.setId(orders.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //获取订单
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        //取消订单,如果订单已经支付需要退款
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID) {
            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    orders.getNumber(),
//                    orders.getNumber(),
//                    new BigDecimal("0.01"),
//                    new BigDecimal("0.01"));
            log.info("申请退款：{}", orders.getNumber());
            orders.setPayStatus(orders.REFUND);
        }
        orders.setId(orders.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }

    /**
     * 派送订单
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = builder()
                .status(DELIVERY_IN_PROGRESS)
                .id(ordersDB.getId())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        if (ordersDB==null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = builder()
                .status(COMPLETED)
                .id(ordersDB.getId())
                .deliveryTime(LocalDateTime.now())
                .build();
        orderMapper.update(orders);
    }

    /**
     * 历史订单查询
     * @param
     * @return
     */
    public PageResult historyPage(int page, int pageSize, Integer status) {
        //启动分页
        PageHelper.startPage(page,pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //查询分页出来的数据
        Page<Orders> pageResult = orderMapper.pageQuery(ordersPageQueryDTO);
        List<Orders> ordersList = pageResult.getResult();
        //需要返回订单详细信息,
        List<OrderVO> orderVOList = new ArrayList<>();
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO =new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orders.getId());
                // 将订单详细封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDetailList(orderDetails);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(pageResult.getTotal(),orderVOList);

    }

    /**
     * 用户端根据订单id查询订单详情
     * @param id
     * @return
     */
    public OrderVO userGetById(Long id) {
        //根据订单id查询订单
        Orders orders = orderMapper.getById(id);
        //根据订单id查询订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        //将共同字段复制到OrderVO返回订单详情给orderVO
        OrderVO orderVO =new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 用户取消订单
     */
//- 待支付和待接单状态下，用户可直接取消订单
//- 商家已接单状态下，用户取消订单需电话沟通商家
//- 派送中状态下，用户取消订单需电话沟通商家
//- 如果在待接单状态下取消订单，需要给用户退款
//- 取消订单后需要将订单状态修改为“已取消”
    @Transactional
    public void userCancel(Long id) {
        //用户取消订单，根据用户id查找订单
        Orders orders = orderMapper.getById(id);
        //判断订单是否为空
        if (orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //如果订单已经接单,将订单状态更改为取消
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //如果订单已经支付，为顾客退款，将支付状态更改为退款
        if (orders.getPayStatus() == PAID && orders.getStatus() ==TO_BE_CONFIRMED) {
            log.info("申请退款：{}", orders.getNumber());
            orders.setPayStatus(REFUND);
        }
        orders.setStatus(CANCELLED);
        orders.setCancelTime(LocalDateTime.now());
        orders.setCancelReason("用户取消");
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    /*再来一单就是将原订单中的商品重新加入到购物车中*/
    //ShoppingCart 比 OrderDetail 多出了 createTime 和 userId
    public void userRepetition(Long id) {
        //查出当前用户id
        Long userId = BaseContext.getCurrentId();
        //根据订单id查出订单详细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList =orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;

        }).collect(Collectors.toList());
        
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    public void reminder(Long id) {
        //用户取消订单，根据用户id查找订单
        Orders orderDB = orderMapper.getById(id);
        //判断订单是否为空
        if (orderDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        Map map =new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content",orderDB.getNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList=new ArrayList<>();
        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)){
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO =new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                String orderDishes = getOrderDishesStr(orders);
                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
}
